Another really interesting microbial diversity paper in mBio.  This one is from Josh Neufeld and colleagues: Multisubstrate Isotope Labeling and Metagenomic Analysis of Active Soil Bacterial Communities. The key thing they did is summarized in their abstract: We incubated samples from three disparate Canadian soils (tundra, temperate rainforest, and agricultural) with five native carbon (12C) or …